VladimirReshetnikov

class A
{
    public class B : A { }
}

partial class C : A.B { }
partial class C : A.B.B { }
partial class C : A.B.B.B { }
partial class C : A.B.B.B.B { }

VladimirReshetnikov

class A
{
    public class B { }
}

class G<T> : A { }

partial class C : G<int>.B { }
partial class C : G<int[]>.B { }
partial class C : G<int[][]>.B { }

VladimirReshetnikov

using System;

class A
{
    static void Main()
    {
        var a = DateTime.Now.Add(TimeSpan.FromHours(1));
    }
}

VladimirReshetnikov

using System;
using System.Security;
using System.Security.Permissions;

class B
{
    [X(SecurityAction.Demand)]
    public B() { }
}

VladimirReshetnikov

using System;

class Program
{
    static void Main()
    {
        Foo(null);
    }

    static void Foo(params string[] s)

VladimirReshetnikov

using System;
using System.Numerics; // Add a reference to System.Numerics.dll
using System.Runtime.CompilerServices;
using System.Threading;

class Program
{
    static void Main()
    {
        Console.WriteLine(Factorial(15000));

VladimirReshetnikov

using System;

class Base
{
    private string x = "x".Print();
}

class Derived : Base
{
    private string y = "y".Print();

VladimirReshetnikov

using System;

class Program
{
    static void Main()
    {
        var x = Main as Action;
    }
}

VladimirReshetnikov

class Program
{
    unsafe static void Main()
    {
        void* x = null;
        var y = (int?) x;
        var z = x as int?; // error CS0244: Neither 'is' nor 'as' is valid on pointer types
    }
}

VladimirReshetnikov

using System;

class A
{
    static void Main()
    {
        const int age = 25;
        const short newAge = 25;
        Console.WriteLine(age == newAge); // True
        Console.WriteLine(newAge.Equals(age)); // True